Quote:
Originally posted by Miss Karly
I'm in 9th grade and can do Algebra, Geometry and some basic Trig, meanwhile I sit here for a half hour trying to figure out this problem on your average percentages. Oh yes... I'm brilliant all right. [/sarcasm]
Can anyone help me on this?! It would be forever appreciated... and you'd get a cookie too.
#22. During a special sale, the price of a television is reduced by 10% the first day of the sale and an additional 4% for each successive day of the sale.
a. If the sale price of the TV after 2 days is $80, what was the original price of the TV? Show how you found your answer.
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I'll get you started with part (a). It's kind of hard with only the keyboard symbols, but if unknown original price is X, then:
X (.9)(.96) = 80 (Note: .9 comes from 10% off 1st day and .96 comes from 4% off 2nd day)
Dividing both sides of the equation by (.9)(.96):
X = 80/((.9)(.96)) = 80/.864 = 92.593... or 92.59 to the nearest cent
Also, I'm using the standard algebra notation where putting numbers next to each other implies multiplication even without a "times" symbol.